mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 17:51:43 +00:00
097fdf06c6
Some fixes to make softints work in tt mode. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
|
|
* Copyright (C) 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <stdlib.h>
|
|
#include <errno.h>
|
|
#include <signal.h>
|
|
#include "sysdep/ptrace.h"
|
|
#include "sysdep/sigcontext.h"
|
|
#include "user_util.h"
|
|
#include "kern_util.h"
|
|
#include "task.h"
|
|
#include "tt.h"
|
|
#include "os.h"
|
|
|
|
void sig_handler_common_tt(int sig, void *sc_ptr)
|
|
{
|
|
struct sigcontext *sc = sc_ptr;
|
|
struct tt_regs save_regs, *r;
|
|
int save_errno = errno, is_user = 0;
|
|
void (*handler)(int, union uml_pt_regs *);
|
|
|
|
/* This is done because to allow SIGSEGV to be delivered inside a SEGV
|
|
* handler. This can happen in copy_user, and if SEGV is disabled,
|
|
* the process will die.
|
|
*/
|
|
if(sig == SIGSEGV)
|
|
change_sig(SIGSEGV, 1);
|
|
|
|
r = &TASK_REGS(get_current())->tt;
|
|
if ( sig == SIGFPE || sig == SIGSEGV ||
|
|
sig == SIGBUS || sig == SIGILL ||
|
|
sig == SIGTRAP ) {
|
|
GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
|
|
}
|
|
save_regs = *r;
|
|
if (sc)
|
|
is_user = user_context(SC_SP(sc));
|
|
r->sc = sc;
|
|
if(sig != SIGUSR2)
|
|
r->syscall = -1;
|
|
|
|
handler = sig_info[sig];
|
|
|
|
/* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
|
|
if (sig != SIGIO && sig != SIGWINCH &&
|
|
sig != SIGVTALRM && sig != SIGALRM)
|
|
unblock_signals();
|
|
|
|
handler(sig, (union uml_pt_regs *) r);
|
|
|
|
if(is_user){
|
|
interrupt_end();
|
|
block_signals();
|
|
set_user_mode(NULL);
|
|
}
|
|
*r = save_regs;
|
|
errno = save_errno;
|
|
}
|
|
|
|
/*
|
|
* Overrides for Emacs so that we follow Linus's tabbing style.
|
|
* Emacs will notice this stuff at the end of the file and automatically
|
|
* adjust the settings for this buffer only. This must remain at the end
|
|
* of the file.
|
|
* ---------------------------------------------------------------------------
|
|
* Local variables:
|
|
* c-file-style: "linux"
|
|
* End:
|
|
*/
|